|Pick #|NFL Team|Player|Position|College|
|---|---|---|---|---|
|417|Buffalo Bills|Wayne Lineberry|Linebacker|East Carolina|
|418|Atlanta Falcons|Paul Williams|Running back|California|
|419|Philadelphia Eagles|Bob Haack|Tackle|Linfield (Ore.)|
|420|Pittsburgh Steelers|Bill Eppright|Kicker|Kent State|
|421|Cincinnati Bengals|Terry Story|Tackle|Georgia Tech|
|422|Boston Patriots|George Muse|Linebacker|Grambling|
|423|New Orleans Saints|Chico Kurzawski|Defensive back|Northwestern|
|424|Detroit Lions|Gary Steele|Tight end|Army|
|425|Denver Broncos|Buster O'Brien|Quarterback|Richmond|
|426|Washington Redskins|Rich Dobbert|Defensive end|Springfield (Mass.)|
|427|Miami Dolphins|Tom Krallman|Defensive end|Xavier|
|428|Green Bay Packers|John Mack|Running back|Central Missouri|
|429|New York Giants|Ken Riley|Linebacker|Texas-Arlington|
|430|Houston Oilers|Hank Autry|Center|Southern Mississippi|
|431|Chicago Bears|Bob Long|Wide receiver|Texas A&M|
|432|San Francisco 49ers|Joe Rushing|Linebacker|Memphis State|
|433|Minnesota Vikings|Wendell Housely|Running back|Texas A&M|
|434|San Diego Chargers|Larry Rentz|Defensive back|Florida|
|435|St. Louis Cardinals|George Hummer|Center|Arizona State|
|436|Cleveland Browns|Bob Oliver|Defensive end|Abilene Christian|
|437|Los Angeles Rams|Jim Thorpe|Defensive back|Hofstra|
|438|Kansas City Chiefs|Ralph Jenkins|Defensive back|Tuskegee|
|439|Dallas Cowboys|Bill Bailey|Defensive tackle|Lewis & Clark|
|440|Oakland Raiders|Billy Austin|Tight end|Arkansas AM&N|
|441|Baltimore Colts|Joe Cowan|Wide receiver|Johns Hopkins|
|442|New York Jets|Fred Zirkie|Defensive tackle|Duke|

Question: how many defensive back players were picked?
Answer: 4